Staff Security Engineer - PKI & Secrets

About FluidstackFluidstack is at the forefront of developing cutting-edge infrastructure designed for the next era of intelligence. Our collaborations with premier AI laboratories, government entities, and industry leaders—including Mistral, Poolside, Black Forest Labs, and Meta—enable us to deliver computational power at unprecedented speeds.We are driven by a sense of urgency to bring Artificial General Intelligence (AGI) to fruition. Our passionate team is dedicated to creating world-class infrastructure, treating our clients' success as our own. If you have a strong sense of purpose, a relentless pursuit of excellence, and are eager to contribute to the acceleration of intelligence, we invite you to be part of our journey in shaping the future.About the RoleWe are seeking a highly experienced Senior / Staff Network Security Engineer to lead our security strategy and protect our rapidly expanding cloud platform. In this role, you will design and implement robust security measures focused on the network perimeter, ensuring that our services are secure, resilient, and dependable on a large scale. You will operate in a high-throughput environment, safeguarding our infrastructure while fostering trust throughout the organization. The ideal candidate will possess over 5 years of in-depth knowledge of contemporary cloud and network architectures and be passionate about nurturing a security-first culture through mentorship and leadership.Key ResponsibilitiesPerimeter & Edge Security Design: Develop and implement robust protections at the network edge, including perimeter firewalls, proxy layers, Web Application Firewalls (WAFs), and CDN-based controls to secure Fluidstack’s global presence. Every ingress point and service should be fortified against unauthorized access and potential threats.DDoS Resilience: Establish and manage sophisticated DDoS defense strategies that guarantee service uptime. Continuously assess traffic patterns, refine defenses such as rate limiting and traffic filtering, and respond swiftly to volumetric spikes or unusual activities.Zero-Trust Implementation: Spearhead the adoption of a Zero-Trust framework across Fluidstack’s cloud and network environments. Design solutions that enforce least privilege access, continuous verification, and service micro-segmentation, thereby eliminating implicit trust at every level.Monitoring & Incident Response: Establish a comprehensive network security monitoring system to detect threats early. Identify indicators of compromise, seek out vulnerabilities, and coordinate rapid incident response efforts to minimize impact.Cross-Department Collaboration: Work closely with Networking, Infrastructure, Site Reliability Engineering (SRE)/DevOps, and Software Engineering teams to integrate security best practices into design and operational workflows.

About the PositionJoin our dynamic Network Security team as a Network Engineer, where you'll play a pivotal role in managing, scaling, and enhancing our network security infrastructure through hands-on operations, innovative design, and strategic implementation. We seek a candidate with robust networking fundamentals and practical experience with security appliances including firewalls and proxies.At Jane Street, our extensive array of distributed systems is built on a resilient, agile, multi-vendor network infrastructure that accommodates diverse traffic profiles, from trading operations to internet connectivity. Supporting such a comprehensive multi-functional network necessitates advanced monitoring and automation tools.Strong interpersonal and communication skills are essential as you collaborate with colleagues around the globe. Your responsibilities will include identifying and resolving network issues, planning and executing deployments, and optimizing systems. Your advanced networking skills and security expertise will also enable you to:Work collaboratively with our Network Engineering team on designing and deploying security perimeters and adjacent network infrastructure.Manage and continuously refine network segmentation, DMZ, and other critical elements of network security.Evaluate and conduct laboratory testing of new platforms for our network security infrastructure.Partner with our Cybersecurity team to detect and mitigate threats and vulnerabilities within our network.Engage with application owners and traders to facilitate secure business workflows.Enhance support by improving network infrastructure observability and scripting, while communicating requirements to our software engineers.Contribute to the improvement of our network security processes and documentation.A holistic approach to system design is vital for success in this role. Our broader Networking team values flexibility, compatibility, and efficiency in crafting solutions, while actively seeking ongoing feedback and buy-in from users across the firm. We foster a culture of intellectual humility, openness, and continuous improvement, which directly influences our team's daily operations. We are all partners striving towards shared goals, always on the lookout for innovative ideas that can strengthen our work.Your exceptional communication abilities and analytical thinking will be indispensable as we support our colleagues in their daily functions and ensure our systems operate at peak performance.

COMPANY OVERVIEWKKR & Co. Inc. is a distinguished global investment firm specializing in alternative asset management along with innovative capital markets and insurance solutions. Our mission is to generate attractive returns on investments through a disciplined approach, employing top-tier talent, and fostering growth within our portfolio companies and communities.TEAM OVERVIEWThe Technology organization at KKR is a collective of passionate technologists and product managers committed to delivering exceptional products and solutions that create significant value for our stakeholders, clients, and investors. Our dedication to technology and innovation drives our commitment to crafting high-quality solutions that meet the complex needs of our evolving business landscape.We prioritize teamwork and collaboration, cultivating a culture that values diverse perspectives and collective success. Our global presence encourages the integration of varied ideas in product delivery, allowing us to design comprehensive and scalable solutions that maximize impact while remaining agile to the changing needs of our business.POSITION OVERVIEWWe are on the lookout for a skilled Network Security Engineer to join our information security team in New York or Boston. This role requires full-time, on-site presence five days a week.The ideal candidate will possess over six years of experience in developing and building security solutions with expertise spanning network, email, endpoint, data, identity, and cloud security. Familiarity with financial systems, cloud services (AWS/Azure), or AI security will be highly regarded.RESPONSIBILITIESNetwork Security:Design, implement, and manage network security solutions, including firewalls, VPNs, intrusion detection/prevention systems (IDS/IPS), and network access control (NAC).Analyze network traffic for potential security threats and vulnerabilities.Develop and enforce network security policies, procedures, and standards.

Maven Clinic stands as the world's leading virtual clinic dedicated to women and families, with a mission to revolutionize healthcare for everyone. Our award-winning digital solutions deliver comprehensive clinical, emotional, and financial support all within a single platform, encompassing areas such as fertility and family planning, maternity and newborn care, parenting and pediatrics, as well as menopause and midlife. Over 2,000 employers and health plans trust Maven's integrated platform to enhance clinical outcomes, reduce healthcare expenses, and promote equitable benefits programs. With a strong reputation for innovation and leadership in the industry, Maven has been recognized in the Time 100 Most Influential Companies, CNBC Disruptor 50, Fast Company Most Innovative Companies, and FORTUNE Best Places to Work. Founded in 2014 by CEO Kate Ryder, Maven has successfully raised over $425 million from prestigious healthcare and technology investors such as General Catalyst, Sequoia, Dragoneer Investment Group, Oak HC/FT, StepStone Group, Icon Ventures, and Lux Capital. Discover more about us at mavenclinic.com.A vibrant and award-winning culture dedicated to an impactful mission – Maven Clinic has received over 30 accolades for workplace excellence and innovation, including:Fortune Change the World (2024)CNBC Disruptor 50 List (2022, 2023, 2024)Fortune Best Workplaces for Millennials (2024)Fortune Best Workplaces in Health Care (2024)TIME 100 Most Influential Companies (2023)Fast Company Most Innovative Companies (2020, 2023)Built In Best Places to Work (2023)Fortune Best Workplaces NY (2020, 2021, 2022, 2023, 2024)Great Place to Work certified (2020, 2021, 2022, 2023, 2024)Fast Company Best Workplaces for Innovators (2022)Built In LGBTQIA+ Advocacy Award (2022)What You’ll DoSecurity Platform EngineeringDesign and implement scalable infrastructure to support compliance with HIPAA, SOC 2, and ISO 27001.Build and maintain systems for identity, authentication, and access management (Okta / GCP IAM / Auth0 / OPA).Implement observability and anomaly detection across microservices, data repositories, and SaaS platforms.Establish and enforce Zero Trust principles and least-privilege access organization-wide.Develop compliance observability dashboards and automate evidence collection.Security Automation & ToolingCreate self-service security tools that seamlessly integrate with developer workflows.

Join our dynamic team at 360IT Professionals as a Senior Network Engineer, where you will play a critical role in designing, implementing, and maintaining our network infrastructure. You will collaborate with cross-functional teams to ensure optimal network performance and security, while also mentoring junior engineers and driving projects to completion.

Why Join Rogo?At Rogo, we are pioneering the development of Wall Street's first authentic AI analyst. Our goal is to empower finance professionals at prestigious investment banks, private equity firms, and investment companies with AI that offers unmatched speed, precision, and insight. We are not merely enhancing financial workflows; we are completely redefining them.This represents a remarkable opportunity to become part of a transformative company at a crucial turning point. With a swiftly expanding client base, confirmed product-market fit, and support from top-tier investors, we are rapidly scaling and establishing a new category in enterprise AI.Our team is composed of sharp, driven individuals who are deeply passionate about our mission. We work with intensity, take ownership of complex challenges, and maintain a relentless focus on our users. If you excel in a dynamic environment, demand high standards, and aspire to help shape the future of finance, we encourage you to consider joining us.The RoleAs a Staff Security Engineer at Rogo, you will serve as our proactive offensive security practitioner, dedicated to identifying vulnerabilities in our products before adversaries can exploit them. You will engage in comprehensive penetration testing, red team exercises, and adversarial security assessments of our AI-driven platform, APIs, and cloud infrastructure, translating those insights into engineering solutions that strengthen our product at its core.Instead of merely gatekeeping releases through manual AppSec reviews, you will develop intelligent security automation to scale offensive testing, triage findings, and embed continuous security validation within the engineering workflow. You will collaborate with development teams not just as a reviewer but as a security engineer who contributes to the codebase, enhances our systems, and elevates the standard for what 'secure by default' means at Rogo.Your ResponsibilitiesYou will be Rogo's lead offensive security capability, discovering, exploiting, and rectifying vulnerabilities across our products, APIs, and infrastructure before external attackers or penetration testers can.Perform hands-on penetration testing and red team assessments against Rogo's applications, APIs, AI/ML pipelines, and cloud environments continuously, not just during annual audits.Create agentic security tooling that detects, validates, and repairs vulnerabilities end-to-end, minimizing manual involvement across code reviews, dependency management, and Infrastructure as Code (IaC).Design and maintain custom offensive tooling, exploit chains, and attack simulations tailored to Rogo's AI platform and architecture.

Why Join Rogo?At Rogo, we are pioneering Wall Street's first authentic AI analyst. Our goal is to empower finance professionals at the world's leading investment banks, private equity funds, and investment firms with AI that provides unmatched speed, accuracy, and insights. We are not merely enhancing financial workflows; we are transforming them fundamentally.This is an extraordinary chance to be part of a transformative company at a pivotal moment. With a rapidly expanding client base, solid product-market alignment, and backing from elite investors, we are scaling swiftly and carving out a new niche in enterprise AI.Our team is intelligent, driven, and wholeheartedly committed to our mission. We work with passion, take ownership of intricate challenges, and maintain a steadfast focus on our users. If you flourish in a dynamic environment, demand excellence, and aspire to help shape the future of finance, we encourage you to apply.The OpportunityRogo is seeking a Staff Security Engineer to spearhead the design and implementation of cloud security architecture across AWS and GCP. This hands-on role is ideal for an engineer who has experience building and managing secure cloud platforms at scale and prefers solving security challenges through code, systems design, and automation rather than relying solely on policy.You will be responsible for the technical direction of cloud security at Rogo: devising secure primitives, authoring Terraform at scale, shaping identity and network architecture, and integrating security into the core platform. You will serve as a senior technical leader while also engaging in tactical tasks such as writing production code, reviewing infrastructure changes, and providing pragmatic security solutions to unblock teams.Your ResponsibilitiesArchitect and implement foundational cloud security measures across AWS and GCP, encompassing account/project structure, IAM models, network segmentation, and secure service-to-service communication.Own and create Terraform-based security architecture, including:Reusable, opinionated Terraform modules for IAM, networking, logging, and encryptionPolicy enforcement and guardrails to prevent insecure infrastructure deploymentsSecure defaults embedded directly into infrastructure primitivesDesign and manage cloud identity systems at scale, including workload identity, service accounts, role assumption, and cross-cloud access patterns.Lead the security design of cloud networking, ensuring robust configurations and compliance.

Join Olo, a premier SaaS provider revolutionizing the restaurant sector by enhancing digital transformation. Our platform empowers businesses to offer highly personalized and lucrative guest experiences, ensuring that every interaction feels special and tailored.As a Staff Security Engineer, you will serve as the technical anchor for the Olo Security Blue Team, spearheading initiatives that fortify our systems while safeguarding sensitive client and customer information. Reporting directly to the Security Engineering Director, you will play a pivotal role in establishing robust security measures that maintain operational integrity.Your responsibilities will encompass identifying and prioritizing future projects based on risk assessments, executing cross-departmental initiatives with both ownership and excellence, and mentoring fellow team members to enhance their skill sets. If you are driven by the desire to mitigate risks while fostering innovation, we invite you to become part of our dynamic team!This position offers the flexibility to work remotely from anywhere within the U.S. or from Olo's vibrant headquarters located in NYC.

We are seeking a skilled Cisco Network Engineer with a robust understanding of network security and hands-on experience with Cisco, Check Point, and F5 devices. The ideal candidate will be proficient in vendor support and possess a well-rounded knowledge of network infrastructure.Key Responsibilities:Manage and troubleshoot Cisco and Arista switches, including STP, Ether channels, switchports, and syslogs.Analyze and monitor health statistics of network components.Troubleshoot Cisco routers including Routing, Syslogs, ACLs, and HSRP.Set up and troubleshoot VPN configurations on Cisco ASA, including monitoring VPN stats and logs.Oversee policy and image management, NAT configurations, and logging.Utilize Cisco and SourceFire IPS to monitor real-time logs and troubleshoot connection issues.Implement F5 BIGIP LTM load balancing methods and perform basic troubleshooting.Work with Check Point to manage blades, policy, NATing, and logging.Tools and Software:SolarWinds IP MonitorKIWI SysloggerCatoolsSolarWinds NPM and NetFlowCacti

About the Team The Server Security team at MongoDB, Inc. is part of the core engineering group, focused on advancing database user security at a global level. Based in New York City, this team designs and builds security features that support MongoDB’s distributed database platform. What You Will Work On Cryptography: Implement Queryable Encryption, at-rest data encryption, and core cryptographic features. For more details on Queryable Encryption, see the MongoDB documentation. Identity & Access: Design authentication and authorization systems, manage TLS, and work with X.509 certificates. Network Security: Develop networking protocols that are both high-performance and low-latency, including PKI, Hashing, and Certificate Revocation Lists (CRLs). System Integrity: Build features that support resilience, observability, and compliance for large-scale distributed systems. Team Culture MongoDB values inclusivity, diversity, and collaboration. The Server Security team applies distributed systems principles to deliver essential features for application developers, system architects, and database operators.

Join our dynamic team at Wehrtyou as a Senior WAN Network Engineer, where you will play a pivotal role in designing, implementing, and managing wide area networks (WAN). Your expertise will ensure optimal network performance and security across our global operations.

Join NBCUniversal as a Senior Staff Cyber Security Engineer (AI), where you will play a pivotal role in enhancing our cyber security initiatives. You will leverage cutting-edge artificial intelligence technologies to develop robust security solutions and safeguard our digital assets.Your expertise will be crucial in identifying vulnerabilities, implementing security measures, and collaborating with cross-functional teams to ensure the integrity of our systems. If you have a passion for AI and a commitment to excellence in cyber security, we want to hear from you!

Join NBCUniversal as a Senior Network Engineer, where you will play a pivotal role in designing, implementing, and maintaining our extensive network infrastructure. You will collaborate with cross-functional teams to ensure seamless connectivity and security across all platforms.

Supported by prominent Silicon Valley investors, Peregrine Technologies empowers public safety organizations, local and state governments, federal agencies, and private sector entities to confront societal challenges with remarkable speed and precision. Our AI-driven platform transforms fragmented data into actionable insights, delivering vital information that enhances decision-making processes, ultimately improving outcomes at every interaction. Currently, Peregrine serves hundreds of clients across over 30 states and two countries, impacting more than 125 million people, and we are poised for further expansion into enterprise markets and international territories.Our TeamWe believe that empathy is key to refining our solutions. Understanding how users interact with our products is crucial to our development process. As an engineer, you will have the chance to collaborate closely with our onsite team to explore the diverse use cases that Peregrine addresses.We are in search of a skilled security engineer to join our core engineering teams. You will face various challenges, from enabling real-time user interactions on detailed maps to architecting scalable backend systems that can process billions of data points.We hold that humility and empathy are essential in crafting effective solutions. You will work alongside our deployment team and users to iteratively resolve their challenges. Creativity and resilience will be vital to realizing our vision.RoleWe seek a software engineer who will take significant ownership across our tech stacks, making impactful decisions with long-term implications. You will play a pivotal role in integrating security into every phase of our product lifecycle.Our technology stack is continually evolving, anchored by a backend foundation utilizing Python, Django, Celery, Airflow, and Kafka; a frontend developed with React, Redux, and Mapbox; data storage solutions like PostgreSQL and Elasticsearch; machine learning models hosted on Bedrock and Sagemaker; and infrastructure that includes AWS, Pulumi, Terraform, and Kubernetes.About YouDevelop scalable frameworks that prioritize security, forming the backbone of our infrastructure and ensuring top-tier data protection.Identify and mitigate emerging security threats while crafting strategies that align with our product goals.Define security architecture across the platform...

At Ripple, we are revolutionizing the way value is transferred globally, making it as seamless as transmitting information. Our innovative crypto solutions empower financial institutions, businesses, governments, and developers to enhance the global financial system, fostering economic fairness and creating opportunities for individuals worldwide. Join a team that supports your professional growth while making a significant impact.If you are eager to make your mark and unlock exceptional career advancement, we invite you to join us in creating real-world value.As a Staff Network Engineer, you will be at the helm of Ripple's global corporate network infrastructure, acting as both a technical architect and a senior project leader. Your mission will be to ensure network consistency across all locations, oversee major site upgrades, and maintain a network uptime of 99.9%. We seek a high-impact contributor who will set the architectural standards for global connectivity, blending strategic planning with hands-on engineering to support our diverse workforce across the globe.

CLEAR builds secure identity technology for both digital and physical spaces. With more than 38 million members and a growing global partner network, CLEAR’s platform helps people move through airports, stadiums, workplaces, and daily routines with greater safety and ease. Role Overview The Senior Security Engineer on the Infrastructure Security Engineering (ISE) team protects CLEAR’s core platforms. This position focuses on cloud security, identity management, and endpoint controls. The work centers on AWS and Kubernetes environments, using infrastructure-as-code to scale and automate security practices. What You Will Do Strengthen security across AWS and Kubernetes infrastructure Develop and implement security controls using infrastructure-as-code Work closely with Engineering, CorpIT, and Security teams to make security a default part of CLEAR’s systems Location This role is based in New York, New York, United States.

Why Join UsAt Brex, we are transforming the way businesses manage their expenses through our innovative AI-powered spend platform. By integrating corporate cards, banking, and global payments with user-friendly software for travel and expenses, we empower companies—from startups to large enterprises like DoorDash, Flexport, and Compass—to control their spending proactively, reduce costs, and enhance efficiency on a global scale.Joining Brex means you will push boundaries, challenge conventional thinking, and collaborate with some of the brightest minds in the industry. We are dedicated to fostering a diverse team and inclusive culture, believing that your potential is only limited by your ambition. We provide you with the tools, resources, and support necessary to elevate your career.Engineering at BrexOur engineering approach at Brex focuses on building scalable systems with intention and speed. Our teams, which encompass Software, Data, Security, and IT, operate with a high degree of autonomy and foster deep collaboration. We take on complex technical challenges, take ownership of our results, and strive for excellence across all stages—from architecture to deployment. At Brex, engineering is a craft, and our builders evolve into leaders.Your RoleAs a Senior Security Operations Engineer at Brex, your mission will be to prevent, detect, and respond to security threats across our corporate and cloud environments. You will leverage existing systems and develop new tools to enhance our security capabilities. Our team is responsible for various functions in corporate security, detection & response, and infrastructure security domains, employing systems engineering and automation to support these functions.Security Operations is nested within our broader Trust & IT organization, providing opportunities to collaborate closely with Application Security, Corporate Engineering, Governance, Risk & Compliance (GRC), and IT. You will work to enhance security configurations, promote positive employee behaviors, and prevent incidents from escalating. Furthermore, you will contribute to our open-source project Substation and have the chance to share insights on the Brex Tech Blog. You will be part of a team that actively engages with the broader security community, committed to mentorship and engineering excellence.We seek individuals with a robust background and a keen interest in detecting, responding to, and resolving security incidents and challenges. You should be passionate about security and eager to contribute to a forward-thinking team.

At January, we are on a mission to revolutionize consumer finance from the ground up. By personalizing interactions and optimizing decision-making throughout all stages of consumer credit, we empower both consumers and creditors, ensuring that credit is fair, accessible, and tailored to individual needs.As a Lead Security Engineer, you will redefine security standards in an industry where trust has been significantly compromised. This is a unique opportunity to join us at a pivotal moment: we have established the hard-earned trust of leading financial institutions, and now you will create the security framework that extends this trust to millions of consumers.You will design and implement a dual trust architecture, safeguarding both consumer-facing experiences and robust enterprise systems. You will tackle technical challenges that are unparalleled in the industry, such as privacy-preserving data systems, compliance automation across multiple jurisdictions, and AI-driven decision-making processes. Your influence will shape our security strategy and culture from the ground up, demonstrating that security is not merely an overhead cost, but a competitive advantage that drives enterprise partnerships and market growth.Your ImpactTransform security into a competitive edge: Position January's security as a key differentiator that attracts banks and enterprises, unlocking Tier 1 partnerships and deals that competitors cannot secure.Promote security-by-design in product and application development: Collaborate with product and engineering teams to identify critical risks early in the process, focusing on application security across frontend, Flask services, and databases. Integrate security into the discovery and design phases, ensuring secure development patterns are embedded in workflows.Design systems for bank-grade data protection: Create and enforce data classification, encryption, and access control mechanisms that comply with regulatory standards, ensuring sensitive data remains within authorized boundaries.Foster a security-first engineering culture: Advocate for security-centric thinking within engineering teams without hindering progress. Lead incident responses decisively, ensuring that January emerges stronger from security events through thorough post-incident analyses.Streamline compliance with minimal overhead: Maintain SOC 2, PCI-DSS, and financial compliance using automated systems and build infrastructure that generates audit evidence seamlessly, eliminating compliance bottlenecks.

Axon Enterprise, Inc. seeks a Senior Network Engineer to join the team in New York. This role centers on designing and implementing network systems that serve law enforcement agencies. The goal is to create secure and dependable connectivity, supporting the daily operations of public safety professionals. Key responsibilities Design and implement network infrastructure tailored for public safety applications Work closely with colleagues from various disciplines to enhance network performance Maintain secure and efficient connectivity across several platforms Location This position is based in New York, New York, United States.